JP2005216438A - Disk reproducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To start reproduction in a short time by discriminating a kind of a disk 90 by only accessing a UTOC (User Table of Contents). <P>SOLUTION: When data recorded in the disk 90 having a data reading area in which a plurality of data are recorded, a UTOC in which first control information for controlling each data recorded in the data recording region is recorded, and a PTOC (Premastered Table of Contents) in which second control information for performing area control of at least the whole disk 90 is recorded is reproduced, first, access is performed for a recording position above the UTOC corresponding to a discrimination information recording position in which discrimination information for discriminating a kind of the disk 90 in the PTOC is recorded , and a kind of the disk 90 is discriminated based on discrimination information recorded in the recording position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a disk-shaped recording medium having a data recording area for recording a plurality of data, a first management area for managing each data recorded in the data recording area, and a second management area for managing the area of the entire disk. The present invention relates to a disk reproducing apparatus and method for reproducing data recorded on a recording medium, and a disk recording apparatus and method for recording data on the disk-shaped recording medium.

  An optical disk can have a recording capacity that is two to three times larger than that of a magnetic disk or the like, and can be accessed at a higher speed than a tape-shaped recording medium. In addition, since data can be recorded / reproduced in a non-contact manner with respect to the recording medium and is excellent in durability, it has been particularly frequently used in recent years.

  Such an optical disk is formed of a read-only optical disk according to a standard CD format (CD-DA format) having a read-only area in which data is recorded as pits, and a magneto-optical recording medium capable of recording and reproducing data. Both a magneto-optical disk according to the CD-MO format as an extended format of the CD-DA format having a recorded recording / reproducing area, a read-only area where data is recorded as pits, and a recording / reproducing area where data can be recorded / reproduced There are known hybrid disks and the like.

  Conventionally, in a disk recording / reproducing apparatus that records data on a disk-shaped recording medium such as a magneto-optical disk or a hybrid disk, when the recording data becomes useless data during recording, the recording is stopped by a manual operation. It was. For example, when recording a song from a compact disk to a magneto-optical disk, recording by the magneto-optical disk recorder is stopped by manual operation after the reproduction of the CD player is completed.

  Here, in a disk-shaped recording medium such as an optical disk or a magnetic disk, a main data recording area for recording main data and a management data area for recording management data are provided, and the main data is determined by the management data recorded in the management data area. The recorded area and recordable area are managed for the recording area. For example, an optical disc according to the CD format has a data area in which program data such as performance data is recorded, and a lead-in area provided on the inner periphery thereof, and the recording position and recorded contents of the data area. As the table of contents (TOC) data, recording start address information and recording end address information are recorded in the lead-in area in order for all program data.

  In recent years, an MD system that digitally records and reproduces music signals and the like using a mini-disc (registered trademark) in which an optical disc having a diameter of 64 mm is housed in a cartridge has been proposed (for example, see Patent Document 1). ). There are three types of minidiscs: a read-only optical disk, a recordable magneto-optical disk, and a hybrid disk in which a read-only area and a recordable area are mixed. In an MD system capable of recording / reproducing main data, a program area and a UTOC area are provided in a recordable area of a mini-disc, and for the program area, the catalog (UTC) data indicating the recording position and the recorded contents is recorded. Recording is performed in the UTOC area. In other words, in the case of a mini-disc system, in order to manage the area where the user has recorded on the disk (data recorded area) and the area where nothing has been recorded yet (data unrecorded area), Management information different from the main data such as music is recorded. The recording device discriminates an area for recording while referring to the UTOC, and the reproducing device discriminates an area to be reproduced by referring to the UTOC.

  That is, in the UTOC, each recorded music is managed in units of data called tracks, and the start address, end address, etc. are recorded. As for a free area where nothing is recorded, its start address, end address, etc. are recorded as areas that can be used for future data recording.

  Also, in such a mini-disc system, a disc name that can show a disc title or the like as a part of the editing function and a track name that can show a title of a song or the like recorded in units of tracks (programs) Can be input and registered in accordance with a predetermined operation method. In the mini-disc system, character information registered as such a disc name and track name (hereinafter, when both are collectively referred to as “name”) is also stored in a predetermined area on the UTOC. For example, at the time of reproduction or the like, the disc name stored in the UTOC and the track name of a desired track can be displayed and output as necessary.

  By registering names for discs and tracks using these functions, the user can check the name of each disc loaded in the playback device and the track number for each track on the display. .

  In addition, as a region for recording the management information, a PTOC (Premastered Table Of Contents) may be provided as a premastered area on the innermost circumference side of the disc. In this PTOC, disc management information for managing the area of the entire disc is recorded as embossed pits by physical structural deformation.

JP 2002-150749 A

  By the way, when data is recorded on the disk-shaped recording medium as described above, first, the UTOC is accessed and then the PTOC is accessed, so that parameters necessary for data writing, such as laser power for recording, are recorded. To get. When reproducing data recorded on the disk-shaped recording medium, the UTOC is first accessed and then the PTOC is further accessed to determine the type of the disk-shaped recording medium. That is, discrimination information for discriminating the type of the disc-shaped recording medium is recorded in advance in the discriminating information recording position of the PTOC, and the discriminating type of the disc-shaped recording medium is discriminated by acquiring this discriminating information during reproduction. can do.

  However, the reason for accessing the PTOC at the time of reproduction is only to acquire the discrimination information, and does not acquire parameters necessary for writing data via the PTOC as in recording. That is, at the time of playback, after first accessing the UTOC to obtain necessary information, it is necessary to further access the PTOC in order to obtain the discrimination information. There was a problem that.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to provide a type of disc-shaped recording medium by accessing the UTOC without accessing the PTOC during reproduction. It is an object of the present invention to provide a disc reproducing apparatus and method capable of starting reproduction in a short time by discriminating the above, and to provide a disc recording apparatus and method for recording data on such a disc-shaped recording medium.

  In order to solve the above-described problem, the present invention provides a data recording area in which a plurality of data is recorded and first management information for managing each data recorded in the data recording area. A disc reproducing apparatus for reproducing data recorded on a disc-shaped recording medium having one management area and at least a second management area in which second management information for performing area management of the entire disc is recorded; In the method, first, a recording position on the first management area corresponding to the determination information recording position where the determination information for determining the type of the disc-shaped recording medium is recorded in the second management area is accessed, and the recording is performed. The type of the disc-shaped recording medium is determined based on the determination information recorded at the position.

  That is, the disc reproducing apparatus to which the present invention is applied has a data recording area in which a plurality of data is recorded, and a first management information for managing each data recorded in the data recording area. A disc playback apparatus for playing back data recorded on a disc-shaped recording medium having a management area and at least a second management area in which second management information for managing the area of the entire disc is recorded. Disc discriminating means for discriminating the type of disc-shaped recording medium, and reproduction control means for controlling the reproduction of each data recorded in the data recording area based on the disc-type recording medium type discriminated by the disc discriminating means And disc discriminating means for discriminating the discriminating information for discriminating the type of disc-shaped recording medium in the second management area First you access to the recording position of the first management area corresponding to the broadcast recording position, to determine the type of the disc-shaped recording medium on the basis of the determination information recorded in the recording position.

  Also, in the disc reproducing method to which the present invention is applied, a data recording area in which a plurality of data is recorded, and first management information for managing each data recorded in the data recording area are recorded. In a disk reproducing method for reproducing data recorded on a disk-shaped recording medium having a management area and a second management area in which at least second management information for performing area management of the entire disk is recorded. A disc discriminating step for discriminating the type of the disc-shaped recording medium; and a reproducing step for reproducing each data recorded in the data recording area based on the disc-shaped recording medium type discriminated in the disc discriminating step. In the disc discrimination step, discrimination information for discriminating the type of the disc-shaped recording medium is recorded in the second management area. First first accesses to the recording position on the management area corresponding to the discrimination information recording position which is to determine the type of the disc-shaped recording medium on the basis of the determination information recorded in the recording position.

  In order to solve the above-described problem, the present invention provides a data recording area in which a plurality of data is recorded and first management information for managing each data recorded in the data recording area. In a disk recording method for recording data on a disk-shaped recording medium having one management area and at least a second management area in which second management information for performing area management of the entire disk is recorded. Discrimination information is recorded at a recording position on the first management area corresponding to the discrimination information recording position where discrimination information for discriminating the type of the disc-shaped recording medium is recorded in the management area.

  That is, the disk recording apparatus to which the present invention is applied has a data recording area in which a plurality of data are recorded and a first management information for managing each data recorded in the data recording area. In a disk recording apparatus for recording data on a disk-shaped recording medium having a management area for recording and a second management area for recording at least second management information for performing area management of the entire disk, the disk is Discriminating information recording means for recording discriminating information for discriminating the type of the recording medium, and the discriminating information recording means records discriminating information for discriminating the type of the disc-shaped recording medium in the second management area. The discrimination information is recorded at the recording position on the first management area corresponding to the discrimination information recording position.

  In the disc recording method to which the present invention is applied, a data recording area in which a plurality of data is recorded, and first management information for managing each data recorded in the data recording area are recorded. In a disk recording method for recording data on a disk-shaped recording medium having a management area for recording and a second management area for recording at least second management information for performing area management of the entire disk, A discriminating information recording step for recording discriminating information for discriminating the type of the recording medium, and discriminating information for discriminating the type of the disc-shaped recording medium in the second management area is recorded in the discriminating information recording step; The discrimination information is recorded at the recording position on the first management area corresponding to the discrimination information recording position.

  In the present invention, first, the recording position on the first management area corresponding to the determination information recording position where the determination information for determining the type of the disc-shaped recording medium is recorded in the second management area is accessed, The type of the disc-shaped recording medium is determined based on the determination information recorded at the recording position.

  As a result, it is possible to discriminate the type of disc-shaped recording medium to be reproduced from now on by accessing only the first management area without accessing the second management area at the time of reproduction. Can be started.

  Hereinafter, as a best mode for carrying out the present invention, a disk drive device 10 equipped with various recording / reproducing functions will be described in detail with reference to the drawings.

  The disk drive apparatus 10 is a conventional disk-type recording medium that employs a conventional magneto-optical recording system, by applying a signal system that is normally used as a recording / reproducing system for the disk-shaped recording medium and that is different from the recording format. This increases the recording capacity of the magneto-optical recording medium. Furthermore, by applying high-density recording technology and a new file system, it is possible to dramatically increase the recording capacity while maintaining compatibility between the conventional magneto-optical recording medium and the case outline and recording / reproducing optical system. The recording format is provided.

  In this specific example, a case where the present invention is applied to a mini-disc (registered trademark) recording medium as a disk-shaped magneto-optical recording medium will be described. Here, in particular, a disk that realizes an increase in recording capacity using a conventional magneto-optical recording medium by applying a format different from the recording format normally used is referred to as the next generation MD1, and this next generation. As an application of MD1, the user can set a unique ID as the next generation MD3, and by applying a new recording format to a new recording medium capable of high density recording, the recording capacity has been increased. The disk will be described as the next generation MD2.

  In the following, specification examples of the next generation MD1 and the next generation MD2 will be described, and processing for generating recording data for both the disks by applying the address conversion method according to the present invention will be described. Since the specification example of the next generation MD3 is the same as that of the next generation MD1, the description thereof is omitted by citing it.

  First, specifications of a conventional mini disc, next generation MD1, and next generation MD2 will be described with reference to FIG. The physical format of the mini disc (and MD-DATA) is defined as follows. The track pitch is 1.6 μm and the bit length is 0.59 μm / bit. The laser wavelength λ is λ = 780 nm, and the aperture ratio of the optical head is NA = 0.45. As a recording system, a groove recording system that uses grooves (grooves on the disk board surface) as tracks for recording and reproduction is adopted. As an address system, a single spiral groove is formed on the disk surface, wobbles meandering at a predetermined frequency (22.05 KHz) are formed on both sides of the groove, and the absolute address is set to the above frequency. Is used as a reference and recorded on a wobbled groove track. In the present specification, an absolute address recorded as wobble is also referred to as ADIP (Address in Pre-groove).

  In the conventional MD, recording is performed by adding 4 sectors as link sectors to 32 sectors as the main data portion and totaling 36 sectors as one cluster unit. The ADIP signal is composed of a cluster address and a sector address. The cluster address is composed of an 8-bit cluster H and an 8-bit cluster L, and the sector address is composed of a 4-bit sector.

  The conventional mini-disc employs an EFM (8-14 conversion) modulation method as a recording data modulation method. As an error correction method, ACIRC (Advanced Cross Interleave Reed-Solomon Code) is used. A convolution type is adopted for data interleaving. As a result, the data redundancy is 46.3%.

  Further, the data detection method in the conventional mini-disc is a bit-by-bit method, and CLV (Constant Linear Velocity) is adopted as the disc driving method. The linear velocity of CLV is 1.2 m / s.

  The standard data rate at the time of recording and reproduction is 133 kB / s, and the recording capacity is 164 MB (140 MB in MD-DATA). Further, the minimum data rewrite unit (unit cluster) is composed of 36 sectors including 32 main sectors and 4 link sectors as described above.

  Next, the next generation MD1 shown as this specific example will be described. The next generation MD1 has the same physical specifications as the conventional mini-disc and the recording medium. Therefore, the track pitch is 1.6 μm, the laser wavelength λ is λ = 780 nm, and the aperture ratio of the optical head is NA = 0.45. As a recording method, a groove recording method is adopted. The address system uses ADIP. As described above, since the optical system configuration, ADIP address reading method, and servo processing in the disk drive device are the same as those of the conventional mini disk, compatibility with the conventional disk is achieved.

  The next generation MD1 adopts the RLL (1-7) PP modulation method (RLL: Run Length Limited, PP: Parity preserve / Prohibit rmtr (repeated minimum transition runlength)) suitable for high-density recording as the modulation method of recording data. doing. Further, as an error correction method, an RS-LDC (Reed Solomon-Long Distance Code) method with BIS (Burst Indicator Subcode) having higher correction capability is used.

  Specifically, 2048 bytes of user data supplied from a host application or the like and 2052 bytes added with 4 bytes of EDC (Error Detection Code) are 1 sector (data sector, which is different from a physical sector on a disk to be described later). As shown in FIG. 2, the 32 sectors of Sector 0 to Sector 31 are combined into a block of 304 columns × 216 rows. Here, scramble processing is performed on 2052 bytes of each sector so as to obtain an exclusive OR (Ex-OR) with a predetermined pseudo-random number. A 32-byte parity is added to each column of the scrambled block to form an LDC (Long Distance Code) block of 304 columns × 248 rows. This LDC block is subjected to interleaving processing to form a block of 152 columns × 496 rows (Interleaved LDC Block). As shown in FIG. The structure is 496 lines, and a 2.5-byte frame synchronization code (Frame Sync) is added to the head position so that one line corresponds to one frame, resulting in a structure of 157.5 bytes × 496 frames. Each row in FIG. 3 corresponds to 496 frames of Frame 10 to Frame 505 in the data area in one recording block (cluster) shown in FIG. 9 to be described later.

  In the above data structure, data interleaving is a block completion type. As a result, the data redundancy becomes 20.50%. Further, a Viterbi decoding method based on PR (1, 2, 1) ML is used as a data detection method.

  A CLV system is used as the disk drive system, and its linear velocity is 2.4 m / s. The standard data rate at the time of recording / reproducing is 4.4 MB / s. By adopting this method, the total recording capacity can be set to 300 MB. Since the window margin is changed from 0.5 to 0.666 by changing the modulation method from EFM to RLL (1-7) PP, 1.33 times higher density can be realized. A cluster, which is the minimum data rewrite unit, is composed of 16 sectors and 64 kB. Since the recording modulation system is changed from the CIRC system to the RS-LDC system with BIS and the system using the difference in sector structure and Viterbi decoding, the data efficiency is increased from 53.7% to 79.5%. 48 times higher density can be realized.

  Taken together, the next generation MD1 can have a recording capacity of 300 MB, which is about twice that of the conventional mini-disc.

  On the other hand, the next-generation MD2 is a recording medium to which high-density recording technology such as a domain wall displacement detection method (DWDD: Domain Wall Placement Detection) is applied. The format is different. The next generation MD2 has a track pitch of 1.25 μm and a bit length of 0.16 μm / bit, and is densified in the line direction.

  In addition, in order to adopt compatibility with the conventional mini disk and the next generation MD1, the optical system, the reading method, the servo processing, and the like are in accordance with the conventional standards, the laser wavelength λ is λ = 780 nm, and the aperture ratio of the optical head is NA = 0.45. The recording method is a groove recording method, and the address method is a method using ADIP. The external form of the housing is the same as that of the conventional mini-disc and next-generation MD1.

  However, when reading the narrower track pitch and linear density (bit length) than the conventional one using an optical system equivalent to the conventional mini-disc and next-generation MD1, the cross track from the detrack margin, land and groove is used. It is necessary to eliminate constraints on talk, wobble crosstalk, focus leakage, CT signals, and the like. Therefore, the next generation MD2 is characterized in that the groove depth, inclination, width and the like of the groove are changed. Specifically, the groove depth of the groove is determined to be 160 nm to 180 nm, the inclination is 60 ° to 70 °, and the width is 600 nm to 800 nm.

  The next generation MD2 is an RLL (1-7) PP modulation system (RLL: Run Length Limited, PP: Parity preserve / Prohibit rmtr (repeated minimum transition runlength)) suitable for high-density recording as a modulation system for recording data. Is adopted. Further, as an error correction method, an RS-LDC (Reed Solomon-Long Distance Code) method with BIS (Burst Indicator Subcode) having higher correction capability is used.

  Data interleaving is a block-complete type. As a result, the data redundancy becomes 20.50%. As a data detection method, a Viterbi decoding method based on PR (1, -1) ML is used. A cluster which is the minimum data rewrite unit is composed of 16 sectors and 64 kB.

  The disk drive system uses a ZCAV (Zone Constant Angular Velocity) system, and the linear velocity is 2.0 m / s. The standard data rate at the time of recording / reproducing is 9.8 MB / s. Therefore, in the next generation MD2, the total recording capacity can be reduced to 1 GB by adopting the DWDD method and this driving method.

  An example of the area structure on the board of the next generation MD1 shown in this specific example is schematically shown in FIGS. The next-generation MD1 is the same medium as a conventional mini-disc, and a PTOC (Premastered Table Of Contents) is provided as a pre-mastered area on the innermost circumference side of the disc. Here, disc management information is recorded as embossed pits due to physical structural deformation. Incidentally, in this next generation MD3, a unique ID that can be set by the user is provided in a part of the PTOC.

  The outer periphery of the pre-mastered area is a recordable area capable of magneto-optical recording, and is a recordable / reproducible area in which a groove as a guide groove of a recording track is formed. The innermost peripheral side of this recordable area is a UTOC (User Table Of Contents) area. In this UTOC area, UTOC information is described, a buffer area with a pre-mastered area, and output of laser light. A power calibration area used for power adjustment and the like is provided.

  As shown in FIG. 5, the next-generation MD2 does not use prepits in order to increase the density. Therefore, the next generation MD2 has no PTOC area. The next-generation MD2 has a unique ID area (UID) for recording information for copyright protection, information for checking data falsification, other non-public information, etc. in the inner peripheral area of the recordable area. Is provided. This UID area is recorded by a recording method different from the DWDD method applied to the next generation MD2.

  In this case, audio data tracks and data tracks for music data can also be recorded on the disc in the next generation MD1 and the next generation MD2. In this case, for example, as shown in FIG. 6, an audio recording area AA in which at least one audio track is recorded in the data area and a PC data recording area DA in which at least one data track is recorded are each arbitrarily set. Will be formed at the position.

  A series of audio tracks and data tracks are not necessarily recorded physically continuously on the disc, and may be divided into a plurality of parts and recorded as shown in FIG. A part refers to a section that is physically continuously recorded. That is, even when there are two physically separated PC data recording areas as shown in FIG. 6, the number of data tracks may be one or plural. However, FIG. 6 shows the physical specifications of the next generation MD1, but the audio recording area AA and the PC data recording area DA can also be recorded in a similar manner for the next generation MD2. .

  A specific example of the recording / reproducing apparatus having compatibility between the next generation MD1 and the next generation MD2 having the physical specifications described above will be described in detail later.

  Based on FIG. 7 and FIG. 8, the disk management structure of this example will be described. FIG. 7 shows the data management structure of the next generation MD1, and FIG. 8 shows the data management structure of the next generation MD2.

  Since the next-generation MD1 is the same medium as the conventional mini-disc as described above, the PTOC is recorded in the next-generation MD1 by the non-rewritable embossed pit as used in the conventional mini-disc. . In this PTOC, the total capacity of the disc, the UTOC position in the UTOC area, the position of the power calibration area, the start position of the data area, the end position of the data area (leadout position), etc. are recorded as management information.

  In the next-generation MD1, ADIP addresses 0000 to 0002 are provided with a power calibration area (Rec Power Calibration Area) for adjusting the laser writing output. In subsequent 0003 to 0005, UTOC is recorded. The UTOC includes management information that is rewritten in accordance with recording / erasing of a track (audio track / data track), and manages the start position, end position, and the like of each track and parts constituting the track. It also manages free areas in which no tracks have been recorded in the data area, that is, writable area parts. On the UTOC, the entire PC data is managed as one track that does not depend on MD audio data. Therefore, even if audio tracks and data tracks are mixedly recorded, the recording position of PC data divided into a plurality of parts can be managed.

  The UTOC data is recorded in a specific ADIP cluster in the UTOC area, and the contents of the UTOC data are defined for each sector in the ADIP cluster. Specifically, UTOC sector 0 (the first ADIP sector in this ADIP cluster) manages parts corresponding to tracks and free areas, and UTOC sector 1 and sector 4 manage character information corresponding to the tracks. ing. In the UTOC sector 2, information for managing the recording date and time corresponding to the track is written.

  The UTOC sector 0 is a data area in which recorded data, a recordable unrecorded area, and data management information are recorded. For example, when recording data on a disk, the disk drive device searches for an unrecorded area on the disk from UTOC sector 0 and records the data here. At the time of reproduction, an area in which a data track to be reproduced is recorded is determined from UTOC sector 0, and the area is accessed to perform a reproduction operation.

  In the next generation MD1, the PTOC and the UTOC are recorded as data modulated by a method based on the conventional mini-disc system, here, the EFM modulation method. Therefore, the next generation MD1 has an area recorded as data modulated by the EFM modulation method and an area recorded as high-density data modulated by the RS-LDC and RLL (1-7) PP modulation methods. It will be.

  Further, the alert track described in the ADIP address 0032 is used to notify that even if the next generation MD1 is inserted into the conventional minidisk disk driver device, this medium is not compatible with the conventional minidisk disk driver device. Is stored. This information may be audio data such as “This disc is in a format not compatible with this playback device” or warning sound data. Further, if it is a disk driver device provided with a display unit, data for displaying this fact may be used. This alert track is recorded by an EFM modulation method so that it can be read by a disk driver device corresponding to a conventional mini disk.

  In the ADIP address 0034, a disc description table (DDT) representing disc information of the next generation MD1 is recorded. In the DDT, a format type, the total number of logical clusters in the disk, an ID unique to the medium, update information of this DDT, defective cluster information, and the like are described.

  Since the DDT area is recorded as high-density data modulated by the RS-LDC and RLL (1-7) PP modulation schemes, a guard band area is provided between the alert track and the DDT.

  In addition, the youngest ADIP address where high-density data modulated by the RLL (1-7) PP modulation method is recorded, that is, the head address of the DDT, has a logical cluster number (LCN) of 0000. ) Is attached. One logical cluster is 65,536 bytes, and this logical cluster is the minimum unit for reading and writing. The ADIP addresses 0006 to 0031 are reserved.

  Subsequent ADIP addresses 0036 to 0038 are provided with a secure area that can be disclosed by authentication. This secure area manages the attributes of each cluster constituting the data, such as whether it can be disclosed or not. In particular, in this secure area, information for copyright protection, information for data falsification check, and the like are recorded. Moreover, various other non-public information can be recorded. This unpublishable area is limitedly accessible only by specially authorized external devices, and includes information for authenticating the accessible external devices.

  From the ADIP address 0038, a user area (arbitrary data length) that can be written and read freely and a spare area (data length 8) are described. When the data recorded in the user area is arranged in ascending order of LCN, it is divided into user sectors (User Sector) with 2,048 bytes as one unit from the top. A user sector number (USN) with a user sector of 0000 is assigned and managed by the FAT file system.

  Next, the data management structure of the next generation MD2 will be described with reference to FIG. The next generation MD2 does not have a PTOC area. Therefore, all disc management information such as total disc capacity, power calibration area position, data area start position, and data area end position (leadout position) is included in the ADIP information as a PDPT (Preformat Disc Parameter Table). Has been recorded. Data is modulated by the RS-LDC and RLL (1-7) PP modulation system with BIS and recorded by the DWDD system.

  Further, a laser power calibration area (PCA) is provided in the lead-in area and the lead-out area. In the next generation MD2, LCN is attached with the ADIP address following PCA as 0000.

  In the next generation MD2, a control area corresponding to the UTOC area in the next generation MD1 is prepared. FIG. 8 shows a unique ID area (Unique ID; UID) for recording information for copyright protection, information for checking data tampering, other non-public information, etc. This UID area is recorded at a further inner peripheral position of the lead-in area by a recording method different from the normal DWDD method.

  Both the next-generation MD1 and next-generation MD2 files are managed based on the FAT file system. For example, each data track has its own FAT file system. Alternatively, one FAT file system can be recorded over a plurality of data tracks.

  Next, the relationship between the ADIP sector structure of the next generation MD1 and the next generation MD2 shown as a specific example of the present invention and the data block will be described with reference to FIG. In a conventional mini-disc (MD) system, a cluster / sector structure corresponding to a physical address recorded as ADIP is used. In this specific example, for convenience of explanation, a cluster based on an ADIP address is referred to as an “ADIP cluster”. A cluster based on addresses in the next generation MD1 and the next generation MD2 is referred to as a “recording block” or a “next generation MD cluster”.

  In the next generation MD1 and the next generation MD2, the data track is handled as a data stream recorded by a series of clusters as a minimum unit of address as shown in FIG.

  As shown in FIG. 9, in the next generation MD1, one conventional cluster (36 sectors) is divided into two, and one recording block is composed of 18 sectors, and the next generation MD2 is composed of 16 sectors.

  The data structure of one recording block (one next generation MD cluster) shown in FIG. 9 includes 512 frames including a 10-frame preamble, a 6-frame postamble, and a 496-frame data portion. Further, one frame in this recording block is composed of a sync signal area, data, BIS, and DSV.

  Further, out of 512 frames of one recording block, each of 496 frames in which main data is recorded is divided into 16 equal parts, which is called an address unit. Each address unit consists of 31 frames. The number of the address unit is referred to as an address unit number (AUN). This AUN is a number assigned to all address units and is used for address management of recording signals.

  When recording high-density data modulated by the 1-7PP modulation method on a conventional mini-disc having a physical cluster / sector structure described in ADIP as in the next generation MD1, it is originally recorded on the disc. There arises a problem that the ADIP address does not match the address of the data block to be actually recorded. Random access is performed based on the ADIP address. In random access, when data is read, the recorded data can be read even if the vicinity of the position where the desired data is recorded, but when data is written. However, it is necessary to access an accurate position so as not to overwrite the already recorded data. Therefore, it is important to accurately grasp the access position from the next generation MD cluster / next generation MD sector associated with the ADIP address.

  Therefore, in the case of the next generation MD1, a high-density data cluster is grasped by a data unit obtained by converting an ADIP address recorded as a wobble on the medium surface according to a predetermined rule. In this case, an integral multiple of the ADIP sector is made to be a high-density data cluster. Based on this concept, when a next generation MD cluster is described for one ADIP cluster recorded on a conventional mini-disc, each next generation MD cluster is associated with a ½ ADIP cluster (18 sectors) section.

  Therefore, in the next generation MD1, ½ cluster of the conventional MD cluster is associated as the minimum recording unit (recording block).

  On the other hand, in the next generation MD2, one cluster is handled as one recording block.

  In this specific example, as described above, a data block of 2048 bytes supplied from the host application is defined as one logical data sector (LDS), and at this time, 32 data recorded in the same recording block. A set of logical data sectors is defined as a logical data cluster (LDC).

  With the data structure as described above, when recording next-generation MD data at an arbitrary position, it can be recorded on the medium with good timing. Also, by including an integer number of next generation MD clusters in an ADIP cluster, which is an ADIP address unit, an address conversion rule from an ADIP cluster address to a next generation MD data cluster address is simplified for conversion. The circuit or software configuration can be simplified.

  Although FIG. 9 shows an example in which two next-generation MD clusters are associated with one ADIP cluster, three or more next-generation MD clusters can be arranged in one ADIP cluster. At this time, one next-generation MD cluster is not limited to being composed of 16 ADIP sectors, but constitutes a difference in data recording density between the EFM modulation scheme and the RLL (1-7) PP modulation scheme, and the next-generation MD cluster. It can be set according to the number of sectors, the size of one sector, or the like.

  9 shows the data structure to be recorded on the recording medium. Next, when the ADIP signal recorded on the groove wobble track on the recording medium is demodulated by the ADIP demodulator 38 of FIG. The data structure of will be described.

  FIG. 10A shows an ADIP data structure of the next generation MD2, and FIG. 10B shows an ADIP data structure of the next generation MD1.

  In the next-generation MD1, a synchronization signal, cluster H (Cluster H) information and cluster L (Cluster L) information indicating a cluster number in the disk, and sector information (Sector) including a sector number in the cluster are described. ing. The synchronization signal is described by 4 bits, the cluster H is described by the upper 8 bits of the address information, the cluster L is described by the lower 8 bits of the address information, and the sector information is described by 4 bits. Also, CRC is added to the latter 14 bits. As described above, the 42-bit ADIP signal is recorded in each ADIP sector.

  In the next-generation MD2, 4-bit synchronization signal data, 4-bit cluster H (Cluster H) information, 8-bit cluster M (Cluster M) information, 4-bit cluster L (Cluster L) information, 4 Bit sector information is described. BCH parity is added to the latter 18 bits. Similarly, in the next generation MD2, a 42-bit ADIP signal is recorded in each ADIP sector.

  In the ADIP data structure, the configuration of the above-described cluster H (Cluster H) information, cluster M (Cluster M), and cluster L (Cluster L) information can be arbitrarily determined. Also, other additional information can be described here. For example, as shown in FIG. 11, in the ADIP signal of the next generation MD2, the cluster information is represented by the upper 8 bits of cluster H (Cluster H) and the lower 8 bits of cluster L (Cluster L), and the lower 8 bits. The disk control information can be described instead of the cluster L represented by As disk control information, servo signal correction value, reproduction laser power upper limit value, reproduction laser power linear velocity correction coefficient, recording laser power upper limit value, recording laser power linear velocity correction coefficient, recording magnetic sensitivity, magnetic-laser pulse phase difference, Such as parity.

  Next, a specific example of the disk drive device 10 compatible with next-generation MD recording / reproduction will be described with reference to FIG. Here, the disk drive device 10 can be connected to a personal computer (hereinafter referred to as a PC) 100, and the next generation MD1 and the next generation MD2 can be used as external storage such as a PC in addition to audio data.

  The disk drive device 10 includes a media drive unit 11, a memory transfer controller 12, a cluster buffer memory 13, an auxiliary memory 14, USB interfaces 15 and 16, a USB hub 17, a system controller 18, and an audio processing unit 19. And an operation unit 61 and a display unit 62.

  The media drive unit 11 performs recording / reproduction to / from individual disks 90 such as the loaded conventional mini disk, next generation MD1, and next generation MD2. The internal configuration of the media drive unit 11 will be described later with reference to FIG.

  The memory transfer controller 12 performs transmission / reception control of reproduction data from the media drive unit 11 and recording data supplied to the media drive unit 11. The cluster buffer memory 13 buffers data read from the data track of the disk 90 by the media drive unit 11 in units of high-density data clusters based on the control of the memory transfer controller 12. The auxiliary memory 14 stores various management information and special information such as UTOC data, CAT data, unique ID, and hash value read from the disk 90 by the media drive unit 11 based on the control of the memory transfer controller 12.

  The system controller 18 can communicate with the PC 100 connected via the USB interface 16 and the USB hub 17, and performs communication control with the PC 100 to execute commands such as a write request and a read request. It performs reception, status information, transmission of other necessary information, etc., and overall control of the disk drive device 10.

  For example, when the disk 90 is loaded in the media drive unit 11, the system controller 18 instructs the media drive unit 11 to read management information and the like from the disk 90, and the PTOC read by the memory transfer controller 12. Management information such as UTOC is stored in the auxiliary memory 14.

  The system controller 18 can grasp the track recording state of the disk 90 by reading the management information. Further, by reading the CAT, the high-density data cluster structure in the data track can be grasped, and the access request to the data track from the PC 100 can be handled.

  Also, the disk authentication process and other processes are executed using the unique ID and the hash value, these values are transmitted to the PC 100, and the disk authentication process and other processes are executed on the PC 100.

  When there is a read request for a FAT sector from the PC 100, the system controller 18 gives a signal to the media drive unit 11 to execute reading of a high-density data cluster including this FAT sector. The read high-density data cluster is written into the cluster buffer memory 13 by the memory transfer controller 12. However, when the data of the FAT sector has already been stored in the cluster buffer memory 13, reading by the media drive unit 11 is not necessary.

  At this time, the system controller 18 gives a signal for reading out the requested FAT sector data from the data of the high-density data cluster written in the cluster buffer memory 13, and the PC 100 via the USB interface 15 and the USB hub 17. Control to send to.

  Further, when there is a write request for a certain FAT sector from the PC 100, the system controller 18 causes the media drive unit 11 to read a high-density data cluster including the FAT sector. The read high-density data cluster is written into the cluster buffer memory 13 by the memory transfer controller 12. However, when the data of the FAT sector has already been stored in the cluster buffer memory 13, reading by the media drive unit 11 is not necessary.

  Further, the system controller 18 supplies the FAT sector data (recording data) transmitted from the PC 100 to the memory transfer controller 12 via the USB interface 15 and rewrites the corresponding FAT sector data on the cluster buffer memory 13. Let it run.

  Further, the system controller 18 instructs the memory transfer controller 12 to store the data of the high-density data cluster stored in the cluster buffer memory 13 with the necessary FAT sector being rewritten as recording data in the media drive unit 11. Let it be transferred. At this time, the media drive unit 11 uses the EFM modulation method if the mounted medium is a conventional mini disk, and uses the RLL (1-7) PP modulation method to generate a high-density data cluster if the medium is a next generation MD1 or next generation MD2. The recorded data is modulated and written.

  In the disk drive device 10 shown as this specific example, the above-described recording / reproduction control is control when recording / reproducing data tracks, and data transfer when recording / reproducing MD audio data (audio tracks) is audio. This is performed via the processing unit 19.

  The audio processing unit 19 includes, for example, an analog audio signal input unit such as a line input circuit / microphone input circuit, an A / D converter, and a digital audio data input unit as an input system. The audio processing unit 19 includes an ATRAC compression encoder / decoder and a compressed data buffer memory. Further, the audio processing unit 19 includes an analog audio signal output unit such as a digital audio data output unit, a D / A converter, and a line output circuit / headphone output circuit as an output system.

  An audio track is recorded on the disk 90 when digital audio data (or an analog audio signal) is input to the audio processing unit 19. Linear PCM audio data that is input as linear PCM digital audio data or analog audio signals and then converted by an A / D converter is subjected to ATRAC compression encoding and stored in a buffer memory. Thereafter, the data is read from the buffer memory at a predetermined timing (data unit corresponding to the ADIP cluster) and transferred to the media drive unit 11.

  The media drive unit 11 modulates the transferred compressed data by the EFM modulation method or the RLL (1-7) PP modulation method, and writes the modulated data on the disk 90 as an audio track.

  When reproducing the audio track from the disk 90, the media drive unit 11 demodulates the reproduction data into the ATRAC compressed data state and transfers it to the audio processing unit 19. The audio processing unit 19 performs ATRAC compression decoding to obtain linear PCM audio data, which is output from the digital audio data output unit. Alternatively, line output / headphone output is performed as an analog audio signal by a D / A converter.

  As will be described later, the operation unit 61 includes a character selection operator using a jog dial, a determination key for determining a command to be selected, playback, stop, pause, recording, cueing, recording mode designation, track mark, etc. Various keys are provided. The operation unit 61 may be provided on a remote controller connected from the disk drive device 10 via a cable, in addition to being provided on the main body side of the disk drive device 10.

  The display unit 62 is a display surface for displaying character information such as the elapsed performance time and the title of the program being played back, and is provided on the main body side of the disk drive device 10 as with the operation unit 61. Alternatively, it may be provided on a remote controller connected from the disk drive device 10 via a cable. The number of display lines in the display unit 62 may be different between the case where it is provided on the main body side of the disk drive device 10 and the case where it is provided on the remote controller. Incidentally, since the display unit 62 requires a certain level of display capability, that is, resolution, it is desirable to use a liquid crystal display tube, a fluorescent display tube, or the like.

  When the user causes the disk drive apparatus 10 to execute a desired command, the command list is displayed on the display unit 62 by operating the operation unit 61.

  FIG. 13 shows a schematic configuration of the operation unit 61 and the display unit 62. In FIG. 13, the same components as those in FIG. 12 are given the same numbers.

  The operation unit 61 includes a REC key 71 for performing a signal recording operation on the disc 90, a reproduction key 72 for reproducing a signal from the disc 90, and a pause function for temporarily stopping the recording operation and the reproduction operation on the disc 90. A pause key 74 for stopping the recording operation and the reproduction operation, a menu key 75 for executing various commands, and a jog dial 76 with a push switch. Incidentally, the reproduction key 72 may be configured as a push switch in the jog dial 76 to reduce the number of keys.

  Further, a group key 81, a shuffle key 82, and a track mark key 83 are provided on the side surface of the disk drive device 10. The group key 81 is a key for instructing the creation of a group in which data (contents) to be recorded on each track of the disc 90 are aggregated. When a pressing input operation of the group key 81 is received, the recording is sequentially performed on the disc 90 in units of groups.

  The shuffle key 82 is a key for randomly changing (shuffling) the reproduction order in the group when a group of contents is designated by the user. Further, the track mark key 83 is a key for attaching a track mark at a desired position of the currently reproduced content data.

  Further, the operation unit 61 and the display unit 62 may be mounted on a remote controller 77 connected to the main body of the disk drive device 10. As the operation unit 61 mounted on the remote controller 77, in addition to the stop key and the jog dial 76, a multipurpose dial 78 for executing playback, fast forward, rewind, etc., a volume control key 79 for controlling the volume, etc. There is.

  The user can designate a desired command by using the jog dial 76 to place a cursor on the command displayed on the display unit 62 and press the push switch.

  FIG. 14 shows a display example on the display unit 62. During recording and reproduction, the system controller 18 displays information as shown in FIG. That is, in addition to displaying information necessary for recording and playback such as track number, time, and playback mode, it is also possible to display information indicating the battery status and the disk rotation status. In addition, a display for identifying whether it is during recording or during playback can be included in this.

  FIG. 14B shows an example in which commands based on the functions installed in the disk drive device 10 are displayed via the display unit. Incidentally, the number of lines that can be displayed at one time on the display unit 62 is limited to a few lines at most. Therefore, when displaying a wide variety of command lists, depending on the operation by the operation unit 61. This is realized by scrolling.

  Here, the functions implemented in the disk drive device 10 include, for example, a grouping function for collectively managing songs to be recorded into a plurality of groups, a group release function for releasing grouped songs, and recorded songs. Various functions such as a Move function for moving between groups have been installed. In addition to the function of playing a single song repeatedly and randomly, in addition to the above-mentioned function of playing back each group, the function of playing back only the top part, and the playback order of the content data recorded on the disc 90 in advance from the top to the bottom A variety of reproductions such as a program reproduction function for performing reproduction in accordance with the registered reproduction order at the time of reproduction can be realized. Furthermore, in addition to functions for freely specifying the display method on the display unit and the method for alerting the user, functions for transmitting / receiving data to / from electronic devices such as personal computers are also provided. Is done.

  In the disk drive device 10, commands corresponding to these functions are set in advance, and operations based on these functions are executed by command selection via the operation unit 61.

  The system controller 18 transfers a command input via the operation unit 61 to the media drive unit 11 or causes the display unit 62 to display character information such as elapsed performance time and title.

  The configuration shown in FIGS. 12 and 13 is an example. For example, when the disk drive device 10 is connected to the PC 100 and used as an external storage device that records and reproduces only the data track, the audio processing unit 19 It is unnecessary. On the other hand, when the main purpose is to record and reproduce audio signals, it is preferable that the audio processing unit 19 is provided and an operation unit and a display unit are provided as a user interface. The connection with the PC 100 is not limited to USB, but, for example, a so-called IEEE 1394 interface conforming to a standard established by IEEE (The Institute of Electrical and Electronics Engineers, Inc.) The connection interface can be applied.

  Next, the configuration of the media drive unit 11 for recording and reproducing conventional mini-discs and next-generation MDs will be described in more detail with reference to FIG.

  The media drive unit 11 is configured to execute EFM modulation and ACIRC encoding for recording of a conventional mini-disc, particularly as a recording processing system, in order to record and reproduce the conventional mini-disc, the next-generation MD1, and the next-generation MD2. It is characterized by comprising a configuration for executing RLL (1-7) PP modulation / RS-LDC encoding for recording of the next generation MD1 and the next generation MD2. In addition, as a playback processing system, a configuration for executing EFM demodulation and ACIRC decoding for playback of a conventional mini-disc, and PR (1, 2, 1) ML and Viterbi decoding are used for playback of the next generation MD1 and next generation MD2. It is characteristic in that it has a configuration for executing RLL (1-7) demodulation and RS-LDC decoding based on the detected data.

  The media drive unit 11 rotationally drives the loaded disk 90 by the spindle motor 21 by the CLV method or the ZCAV method. At the time of recording and reproduction, laser light is irradiated from the optical head 22 to the disk 90.

  The optical head 22 performs a high level laser output for heating the recording track to the Curie temperature during recording, and a relatively low level laser output for detecting data from reflected light by the magnetic Kerr effect during reproduction. Do. For this reason, the optical head 22 is equipped with a laser diode as a laser output means, an optical system including a polarization beam splitter, an objective lens, and the like, and a detector for detecting reflected light. The objective lens provided in the optical head 22 is held so as to be displaceable in the radial direction of the disk and in the direction of contacting and separating from the disk by, for example, a biaxial mechanism.

  In addition, in this example, in order to obtain the maximum reproduction characteristics for the conventional mini-disc and the next-generation MD1 and the next-generation MD2 having different physical specifications on the medium surface, both discs are read at the time of data reading. A phase compensator capable of optimizing the bit error rate is provided in the reading light optical path of the optical head 22.

  A magnetic head 23 is disposed at a position facing the optical head 22 across the disk 90. The magnetic head 23 applies a magnetic field modulated by the recording data to the disk 90. Although not shown, a sled motor and a sled mechanism are provided for moving the entire optical head 22 and the magnetic head 23 in the disk radial direction.

  In the media drive unit 11, a recording processing system, a playback processing system, a servo system, and the like are provided in addition to the recording / reproducing head system using the optical head 22 and the magnetic head 23 and the disk rotation driving system using the spindle motor 21. As a recording processing system, there are a part for performing EFM modulation and ACIRC encoding at the time of recording on a conventional minidisc, and a part for performing RLL (1-7) PP modulation and RS-LDC encoding at the time of recording to the next generation MD1 and next generation MD2. Provided.

  In addition, the reproduction processing system includes a part that performs demodulation and ACIRC decoding corresponding to EFM modulation during reproduction of a conventional mini-disc, and a demodulation that supports RLL (1-7) PP modulation during reproduction of the next generation MD1 and next generation MD2. (RLL (1-7) demodulation based on data detection using PR (1, 2, 1) ML and Viterbi decoding), and a part for performing RS-LDC decoding are provided.

  Information detected as reflected light by the laser irradiation of the optical head 22 on the disk 90 (photocurrent obtained by detecting the laser reflected light with a photodetector) is supplied to the RF amplifier 24. The RF amplifier 24 performs current-voltage conversion, amplification, matrix calculation, and the like on the input detection information, and performs reproduction RF signal, tracking error signal TE, focus error signal FE, groove information (on the disc 90) as reproduction information. (ADIP information recorded by track wobbling) and the like are extracted.

  At the time of reproducing a conventional mini disc, the reproduced RF signal obtained by the RF amplifier is processed by the EFM demodulator 27 and the ACIRC decoder 28 via the comparator 25 and the PLL circuit 26. The reproduced RF signal is binarized by the EFM demodulator 27 to form an EFM signal sequence, EFM demodulated, and further subjected to error correction and deinterleave processing by the ACIRC decoder 28. If it is audio data, it will be in the state of ATRAC compression data at this time. At this time, the selector 29 is selected on the conventional mini-disc signal side, and the demodulated ATRAC compressed data is output to the data buffer 30 as reproduced data from the disc 90. In this case, the compressed data is supplied to the audio processing unit 19 in FIG.

  On the other hand, at the time of reproduction of the next generation MD1 or the next generation MD2, the reproduction RF signal obtained by the RF amplifier passes through the A / D conversion circuit 31, the equalizer 32, the PLL circuit 33, and the PRML circuit 34 to RLL (1-7 The signal is processed by the PP demodulator 35 and the RS-LDC decoder 36. The reproduction RF signal is obtained by the RLL (1-7) PP demodulator 35 by obtaining reproduction data as an RLL (1-7) code string by data detection using PR (1, 2, 1) ML and Viterbi decoding. The RLL (1-7) demodulation process is performed on the RLL (1-7) code string. Further, the RS-LDC decoder 36 performs error correction and deinterleave processing.

  In this case, the selector 29 selects the next generation MD1 or next generation MD2 side, and the demodulated data is output to the data buffer 30 as reproduction data from the disk 90. At this time, the demodulated data is supplied to the memory transfer controller 12 of FIG.

  The tracking error signal TE and the focus error signal FE output from the RF amplifier 24 are supplied to the servo circuit 37, and the groove information is supplied to the ADIP decoder 38.

  The ADIP decoder 38 limits the band of the groove information by a bandpass filter and extracts a wobble component, and then performs FM demodulation and biphase demodulation to extract an ADIP address. The extracted ADIP address, which is absolute address information on the disc, is passed through the MD address decoder 39 in the case of the conventional mini disc and the next generation MD1, and the next generation MD address decoder in the case of the next generation MD2. 40 to the drive controller 41.

  The drive controller 41 executes a predetermined control process based on each ADIP address. The groove information is returned to the servo circuit 37 for spindle servo control.

  The servo circuit 37 generates spindle error signals for CLV servo control and ZCAV servo control based on an error signal obtained by, for example, integrating the phase error with the reproduction clock (PLL clock at the time of decoding) with respect to the groove information. Generate.

  Further, the servo circuit 37 performs various servo control signals based on the spindle error signal, the tracking error signal, the focus error signal supplied from the RF amplifier 24 as described above, or the track jump command, access command, etc. from the drive controller 41. (Tracking control signal, focus control signal, thread control signal, spindle control signal, etc.) are generated and output to the motor driver 42. That is, various servo control signals are generated by performing necessary processing such as phase compensation processing, gain processing, and target value setting processing on the servo error signal and command.

  The motor driver 42 generates a predetermined servo drive signal based on the servo control signal supplied from the servo circuit 37. The servo drive signal here includes a biaxial drive signal (two types of focus direction and tracking direction) for driving the biaxial mechanism, a sled motor drive signal for driving the sled mechanism, and a spindle motor drive signal for driving the spindle motor 21. It becomes. By such servo drive signals, focus control and tracking control for the disk 90 and CLV control or ZCAV control for the spindle motor 21 are performed.

  When a recording operation is performed on the disk 90, high-density data or normal ATRAC compressed data from the audio processing unit 19 is supplied from the memory transfer controller 12 shown in FIG.

  At the time of recording on the conventional mini disc, the selector 43 is connected to the conventional mini disc side, and the ACIRC encoder 44 and the EFM modulator 45 function. In this case, if it is an audio signal, the compressed data from the audio processing unit 19 is interleaved and an error correction code added by the ACIRC encoder 44 and then EFM-modulated by the EFM modulating unit 45. The EFM modulation data is supplied to the magnetic head driver 46 via the selector 43, and the magnetic head 23 applies a magnetic field based on the EFM modulation data to the disk 90 to record the modulated data.

  At the time of recording on the next generation MD1 and the next generation MD2, the selector 43 is connected to the next generation MD1 / next generation MD2 side, and the RS-LCD encoder 47 and the RLL (1-7) PP modulation section 48 function. In this case, the high-density data sent from the memory transfer controller 12 is subjected to interleaving and RS-LDC error correction code addition by the RS-LCD encoder 47 and then to the RLL (1-7) PP modulation unit 48. RLL (1-7) modulation.

  The recording data modulated into the RLL (1-7) code string is supplied to the magnetic head driver 46 through the selector 43, and the magnetic head 23 applies the magnetic field to the disk 90 based on the modulation data. Is recorded.

  The laser driver / APC 49 causes the laser diode to perform a laser emission operation during reproduction and recording as described above, but also performs a so-called APC (Automatic Laser Power Control) operation. Specifically, although not shown, a detector for laser power monitoring is provided in the optical head 22, and this monitor signal is fed back to the laser driver / APC 49. The laser driver / APC 49 compares the current laser power obtained as a monitor signal with a preset laser power and reflects the error in the laser drive signal, thereby outputting the laser power output from the laser diode. Is controlled to be stabilized at the set value. Here, as the laser power, values as the reproduction laser power and the recording laser power are set in a register in the laser driver / APC 49 by the drive controller 41.

  Based on an instruction from the system controller 18, the drive controller 41 controls each component so that each of the above operations (access, various servos, data writing, and data reading) is executed. In addition, each part enclosed with the dashed-dotted line in FIG. 15 can also be comprised as a circuit of 1 chip | tip.

  By the way, when the disc 90 has a data track recording area and an audio track recording area set in advance as shown in FIG. 6, the system controller 18 determines whether the data to be recorded / reproduced is an audio track or a data track. In response to this, the drive controller 41 of the media drive unit 11 is instructed to access based on the set recording area.

  In addition, it is possible to perform control for permitting recording of only one of PC data and audio data and prohibiting recording of other data on the loaded disk 90. That is, control can be performed so that PC data and audio data are not mixed.

  Therefore, the disk drive apparatus 10 shown as this specific example can realize compatibility among the conventional mini disk, the next generation MD1, the next generation MD3, and the next generation MD2 by including the above-described configuration.

  Of course, the disk drive apparatus 10 shown as this specific example may be configured as a recording apparatus that executes only the above-described recording operation or a reproducing apparatus that executes only the above-described reproducing operation.

  Next, a method for discriminating the type of the disc 90 during reproduction by the disc drive apparatus 10 will be described with reference to FIG.

  When the disk drive apparatus 10 receives an instruction to start reproduction, the process first proceeds to step S11, and the type of the disk 90 is determined via a servo signal. Incidentally, in this step S11, only the next generation MD2 can be selectively discriminated by identifying the rising or falling of the servo signal. Whether it corresponds to the conventional mini disc, the next generation MD1, or the next generation MD3 is discriminated after step S12.

  When the process proceeds to step S12, first, a predetermined recording position in the UTOC (hereinafter referred to as a discrimination information recording position) is accessed. The discrimination information recording position on the UTOC is a position corresponding to the discrimination information recording position on the PTOC, for example, as shown in FIG. Incidentally, discrimination information (for example, a character string such as “HIMD”) for identifying any one of the conventional mini disc, the next generation MD1, and the next generation MD3 is recorded at the discrimination information recording position on the conventional PTOC. “0000” was written at the corresponding recording position on the UTOC, and nothing was recorded.

  In the present invention, discrimination information similar to that recorded at the discrimination information recording position on the PTOC is recorded at the discrimination information recording position on the UTOC. In step S12, the discrimination information recorded on the UTOC is accessed to obtain the discrimination information recorded there. Incidentally, in the following example, if the discrimination information is “HIMD”, it is discriminated that it is the next generation MD3, and if the discrimination information is “MINI”, it is discriminated that it is the conventional mini disc or the next generation MD1. To do. Further, if the determination information is other than that, it is determined that a TOC error has occurred in the disk 90.

  Incidentally, if it is determined that the determination information is “MINI”, the process proceeds to step S13, and further the format information in the UTOC is determined to determine whether the disc is a conventional disc or the next generation MD1. Become.

  As described above, the disk drive device 10 to which the present invention is applied can determine the type of the disk 90 to be reproduced from now on by accessing only the UTOC without accessing the PTOC. For this reason, when data is reproduced, it is not necessary to access the PTOC only for obtaining the discrimination information after accessing the UTOC, and the reproduction can be started in a short time.

  When data is recorded from the disk drive device 10 to the disk 90, a character string such as “HIMD” or “MINI” is recorded in advance as discrimination information at the discrimination information recording position on the UTOC described above. May be. When the disc 90 recorded in this way is reproduced by the disc drive device 10, the type of the disc 90 can be determined by accessing only on the UTOC as described above.

It is a figure explaining the specification of next generation MD1 and next generation MD2, and the conventional minidisc. It is a figure explaining the RS-LDC block with BIS of the error correction method in the next generation MD1 and the next generation MD2. It is a figure explaining BIS arrangement | positioning in 1 recording block of next generation MD1 and next generation MD2. It is a schematic diagram explaining the area structure on the disk surface of next generation MD1. It is a schematic diagram explaining the area structure on the disk surface of next generation MD2. It is a schematic diagram explaining the area configuration on the board surface when audio data and PC data are mixedly recorded on the next-generation MD1 disc. It is a schematic diagram explaining the data management structure of next generation MD1. It is a schematic diagram explaining the data management structure of next generation MD2. It is a schematic diagram explaining the relationship between the ADIP sector structure and data block of next generation MD1 and next generation MD2. It is a schematic diagram which shows the ADIP data structure of next generation MD2, and the ADIP data structure of next generation MD1. It is a schematic diagram explaining the modification of the data management structure of next generation MD2. FIG. 2 is a block diagram illustrating a disk drive device that performs recording and reproduction with compatibility with the next generation MD1 and the next generation MD2. It is a figure which shows the structural example of the operation part provided in the housing | casing exterior, and a display part. It is a figure for demonstrating about the detail of a display part. It is a block diagram for demonstrating the media drive part of a disk drive apparatus. It is a flowchart which shows the procedure which discriminate | determines the kind of disk with the disk drive apparatus to which this invention is applied. It is a figure for demonstrating per discrimination | determination information recording position.

Explanation of symbols

  10 disk drive device, 11 media drive unit, 12 memory transfer controller, 13 cluster buffer memory, 14 auxiliary memory, 15, 16 USB interface, 17 USB hub, 18 system controller, 19 audio processing unit, 61 operation unit, 62 display unit , 71 REC key, 81 group key, 82 shuffle key, 90 disc

Claims (4)

A data recording area in which a plurality of data is recorded, a first management area in which first management information for managing each data recorded in the data recording area is recorded, and area management of at least the entire disk In a disc reproducing apparatus for reproducing data recorded on a disc-shaped recording medium having a second management area in which second management information for recording is recorded,
Disc discriminating means for discriminating the type of the disc-shaped recording medium;
Replay control means for controlling the replay of each data recorded in the data recording area based on the type of the disc-shaped recording medium discriminated by the disc discriminating means,
The disc discriminating means moves to a recording position on the first management area corresponding to a discrimination information recording position where discrimination information for discriminating the type of the disc-shaped recording medium is recorded in the second management area. A disc reproducing apparatus characterized by first accessing and discriminating the type of the disc-shaped recording medium based on discrimination information recorded at the recording position. A data recording area in which a plurality of data is recorded, a first management area in which first management information for managing each data recorded in the data recording area is recorded, and area management of at least the entire disk In a disk recording apparatus for recording data on a disk-shaped recording medium having a second management area in which second management information to be recorded is recorded,
A discriminating information recording means for recording discriminating information for discriminating the type of the disc-shaped recording medium during reproduction;
The discrimination information recording means is a recording position on the first management area corresponding to a discrimination information recording position where discrimination information for discriminating the type of the disc-shaped recording medium is recorded in the second management area. The disc recording apparatus characterized in that the discrimination information is recorded on the disc. A data recording area in which a plurality of data is recorded, a first management area in which first management information for managing each data recorded in the data recording area is recorded, and area management of at least the entire disk In a disk reproduction method for reproducing data recorded on a disk-shaped recording medium having a second management area in which second management information for recording is recorded,
Disc discriminating step for discriminating the type of the disc-shaped recording medium;
A reproducing step of reproducing each data recorded in the data recording area based on the type of the disc-shaped recording medium determined in the disc determining step,
In the disc discrimination step, to a recording position on the first management area corresponding to a discrimination information recording position where discrimination information for discriminating the type of the disc-shaped recording medium in the second management area is recorded. A disc reproducing method characterized by first accessing and discriminating the type of the disc-shaped recording medium based on discriminating information recorded at the recording position. A data recording area in which a plurality of data is recorded, a first management area in which first management information for managing each data recorded in the data recording area is recorded, and area management of at least the entire disk In a disk recording method for recording data on a disk-shaped recording medium having a second management area in which second management information to be recorded is recorded,
A discrimination information recording step for recording discrimination information for discriminating the type of the disc-shaped recording medium during reproduction;
In the discrimination information recording step, the recording position on the first management area corresponding to the discrimination information recording position where the discrimination information for discriminating the type of the disc-shaped recording medium is recorded in the second management area A disc recording method comprising: recording the discrimination information on a disc.

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